:root {
  --ink: #121212;
  --paper: #fff;
  --muted: #535c60;
  --blue: #b5e4ec;
  --blue-soft: #edf7f8;
  --red: #ee3024;
  --line: #d2dcde;
  --page-width: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 1rem/1.65 Arial, Helvetica, sans-serif; overflow-wrap: break-word; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { overflow-wrap: anywhere; }
h1, h2 { font-family: Impact, 'Arial Narrow', Arial, sans-serif; font-weight: 400; line-height: 1.05; text-transform: uppercase; }
h1 { font-size: clamp(2.6rem, 7vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.1rem); }
h3 { font-size: 1.25rem; line-height: 1.3; }
a:focus-visible, button:focus-visible { outline: 3px solid #126a79; outline-offset: 5px; }
.container { width: min(var(--page-width), calc(100% - 40px)); margin-inline: auto; }
.section { padding-block: 46px; }
.section-soft { background: var(--blue-soft); }
.section-copy { margin-block: 20px 24px; max-width: 62ch; }
.preserve-lines { white-space: pre-line; }
.eyebrow { display: block; font-size: .7rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.text-link { display: inline-flex; align-items: center; gap: 10px; padding-block: 9px; border-bottom: 1px solid var(--ink); font-size: .9rem; font-weight: 700; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 44px; padding: 12px 22px; background: var(--ink); color: #fff; font-weight: 700; font-size: .9rem; line-height: 1.4; }
.button:hover { background: #343434; }
.button-row { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 5px; left: 5px; z-index: 50; padding: 10px 20px; background: var(--ink); color: white; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 20; background: white; border-bottom: 1px solid var(--line); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding-block: 12px; }
.brand-link { margin-right: auto; flex-shrink: 0; }
.brand-logo { width: 94px; height: 49px; object-fit: contain; }
.register-button { padding: 10px 14px; }
.menu-toggle { align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 8px 10px; background: transparent; color: var(--ink); border: 1px solid var(--line); cursor: pointer; font-size: .85rem; }
.menu-toggle:not([hidden]) { display: inline-flex; }
.main-navigation { order: 4; display: flex; flex-direction: column; width: 100%; padding-block: 10px; gap: 2px; max-height: 65vh; overflow: auto; }
.main-navigation a { padding: 10px 4px; font-size: .9rem; }
.main-navigation a[aria-current='page'] { color: #b51d14; text-decoration: underline; text-underline-offset: 7px; }
.nav-enhanced .main-navigation:not(.is-open) { display: none; }
.hero { overflow: hidden; }
.hero-grid { display: grid; gap: 30px; align-items: center; }
.hero-date { margin-top: 22px; font-size: .9rem; font-weight: 700; }
.hero-title { margin-block: 18px; color: var(--red); font-size: clamp(3.8rem, 13vw, 8rem); line-height: .98; letter-spacing: -.025em; }
.hero-description { margin-block: 0 28px; font-size: 1.2rem; max-width: 32ch; }
.hero-image { width: 100%; aspect-ratio: 800/540; object-fit: cover; }
.event-facts { display: grid; border-block: 1px solid var(--ink); }
.event-facts > div { padding: 20px 0; }
.event-facts > div + div { border-top: 1px solid var(--line); }
.event-facts p { margin-top: 7px; font-weight: 700; }
.event-facts small { color: var(--muted); }
.about-preview, .venue-section, .about-block { display: grid; gap: 30px; align-items: center; }
.about-preview h2 { margin-top: 16px; }
.feature-image { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 18px; margin-bottom: 25px; flex-wrap: wrap; }
.card-grid { display: grid; gap: 28px; }
.content-card { min-width: 0; background: white; border-bottom: 1px solid var(--line); }
.card-image { width: 100%; aspect-ratio: 4/3; object-fit: cover; background: var(--blue-soft); }
.card-body { padding: 20px 0 25px; }
.section-soft .card-body { padding-inline: 20px; }
.card-body h3 { margin: 10px 0; }
.card-body > p { color: var(--muted); font-size: .95rem; }
.card-body .talk-title { font-weight: 700; color: var(--ink); }
.card-meta { margin: 15px 0; font-size: .8rem; }
.card-meta > div { display: flex; gap: 10px; }
.card-meta dt { min-width: 46px; color: var(--muted); }
.card-meta dd { margin: 0; }
.card-body .text-link { margin-top: 15px; }
.status-label { display: inline-block; padding: 3px 9px; background: var(--blue-soft); border: 1px solid #adcdd2; font-size: .7rem; line-height: 1.5; }
.notice { padding: 16px 18px; background: var(--blue-soft); border-left: 3px solid #65acb9; font-size: .85rem; margin-bottom: 22px; }
.schedule-list { list-style: none; margin: 0; padding: 0; }
.schedule-item { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 18px; padding: 23px 0; border-bottom: 1px solid var(--line); }
.schedule-time { font-weight: 700; font-size: .95rem; }
.schedule-time span { display: block; color: var(--muted); font-size: .8rem; }
.schedule-item h3 { margin-bottom: 8px; }
.schedule-item p { color: var(--muted); font-size: .9rem; }
.venue-label { margin-block: 9px; }
.schedule-zone { font-size: .85rem; margin-bottom: 15px; }
.partner-card .card-image { object-fit: contain; aspect-ratio: 2/1; padding: 20px; }
.venue-section h2 { margin-top: 12px; }
.page-heading { padding-block: 40px 28px; border-bottom: 1px solid var(--ink); }
.page-heading h1 { margin: 16px 0; }
.page-heading > p:last-child { color: var(--muted); font-size: .9rem; }
.page-content { min-height: 45vh; }
.about-block + .about-block { margin-top: 40px; padding-top: 40px; border-top: 1px solid var(--line); }
.about-logo { width: min(100%, 390px); margin-inline: auto; object-fit: contain; }
.empty-state { padding-block: 25px; color: var(--muted); }
.site-footer { background: var(--ink); color: #fff; padding: 28px 0; font-size: .8rem; text-align: center; }
@media (min-width: 680px) {
  .container { width: min(var(--page-width), calc(100% - 64px)); }
  .section { padding-block: 64px; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .event-facts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .event-facts > div { padding: 25px; }
  .event-facts > div:first-child { padding-left: 0; }
  .event-facts > div + div { border-top: 0; border-left: 1px solid var(--line); }
  .about-preview, .venue-section, .about-block { grid-template-columns: 1fr 1fr; gap: 45px; }
  .schedule-item { grid-template-columns: 120px minmax(0, 1fr); }
}
@media (min-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .partner-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1180px) {
  .menu-toggle:not([hidden]) { display: none; }
  .header-inner { flex-wrap: nowrap; gap: 24px; }
  .main-navigation, .nav-enhanced .main-navigation:not(.is-open) { order: initial; display: flex; flex-direction: row; flex-wrap: wrap; width: auto; flex: 1; justify-content: flex-end; gap: 6px 14px; max-height: none; overflow: visible; }
  .main-navigation a { padding: 8px 0; font-size: .8rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .site-header, .site-footer, .button, .text-link { display: none; }
  .section { padding-block: 20px; }
  .content-card, .schedule-item { break-inside: avoid; }
}

.card-title, .schedule-title { font-family: Arial, Helvetica, sans-serif; font-size: 1.25rem; font-weight: 700; line-height: 1.3; text-transform: none; }
.card-body .card-title { margin: 10px 0; }
.schedule-title { margin-bottom: 8px; }

/* Speakers: one full-width card per row, at every screen size. */
.speakers-list { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; }
.speaker-card { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; padding: 24px; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; }
.speaker-portrait { width: 136px; height: 136px; aspect-ratio: 1; border-radius: 50%; object-fit: cover; object-position: center; background: var(--blue-soft); }
.speaker-content { min-width: 0; }
.speaker-talk-title { margin: 0 0 12px; font-family: Arial, Helvetica, sans-serif; font-size: clamp(1.65rem, 3.5vw, 2.5rem); line-height: 1.18; font-weight: 800; letter-spacing: -.025em; text-transform: none; color: var(--ink); overflow-wrap: anywhere; }
.speaker-name { margin: 0 0 16px; font-size: 1.1rem; line-height: 1.5; font-weight: 700; color: #b51d14; }
.speaker-description { color: var(--muted); line-height: 1.75; overflow-wrap: anywhere; }
.speaker-details { display: flex; flex-wrap: wrap; gap: 16px 40px; margin: 24px 0 0; padding-top: 20px; border-top: 1px solid var(--line); }
.speaker-details > div { min-width: 0; max-width: 100%; }
.speaker-details dt { margin-bottom: 4px; font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.speaker-details dd { margin: 0; font-size: .95rem; font-weight: 700; overflow-wrap: anywhere; }
.speaker-status { margin-top: 16px; }
@media (min-width: 680px) {
  .speaker-card { grid-template-columns: 176px minmax(0, 1fr); align-items: start; gap: 32px; padding: 32px; }
  .speaker-portrait { width: 176px; height: 176px; }
}
@media (min-width: 1000px) {
  .speaker-card { grid-template-columns: 200px minmax(0, 1fr); gap: 40px; padding: 40px; }
  .speaker-portrait { width: 200px; height: 200px; }
}

/* Sponsor logos keep their proportions and wrap within each tier. */
.sponsor-wall { display: grid; gap: 48px; }
.sponsor-group { --logo-width: 140px; --logo-height: 84px; text-align: center; }
.sponsor-group--tier-1 { --logo-width: 280px; --logo-height: 160px; }
.sponsor-group--tier-2 { --logo-width: 200px; --logo-height: 116px; }
.sponsor-group--partners { --logo-width: 96px; --logo-height: 56px; padding-top: 40px; border-top: 1px solid var(--line); }
.sponsor-group-title { font-family: Arial, Helvetica, sans-serif; font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 24px; }
.sponsor-group--partners .sponsor-group-title { font-size: 1.5rem; letter-spacing: -.02em; text-transform: none; }
.sponsor-logos { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 24px 28px; list-style: none; padding: 0; margin: 0; }
.sponsor-logo-item { width: var(--logo-width); max-width: 100%; }
.sponsor-logo-frame { width: 100%; height: var(--logo-height); display: flex; align-items: center; justify-content: center; }
.sponsor-logo-frame .sponsor-logo { display: block; width: 100%; height: 100%; object-fit: contain; }
.sponsor-logo-frame:focus-visible { outline: 3px solid var(--red); outline-offset: 8px; }
@media (min-width: 680px) {
  .sponsor-wall { gap: 64px; }
  .sponsor-group--tier-1 { --logo-width: 400px; --logo-height: 220px; }
  .sponsor-group--tier-2 { --logo-width: 280px; --logo-height: 154px; }
  .sponsor-group--tier-3 { --logo-width: 190px; --logo-height: 104px; }
  .sponsor-group--partners { --logo-width: 120px; --logo-height: 66px; }
  .sponsor-logos { gap: 32px 48px; }
}